2. Rumination Eating Disorder

Rumination disorder involves regurgitating food—bringing up swallowed food, chewing it, spitting it out, or swallowing it again (without disgust or nausea).
Rumination disorder is sometimes accompanied by malnutrition and may result in weight loss. Like pica, this condition is more prevalent in individuals with intellectual disability.

In children, risk factors for rumination disorder are stress, lack of stimulation, and relationship problems.

3. Avoidant/restrictive Food Intake Disorder

Avoidant/restrictive food intake disorder is characterized by avoidance of food—due to a lack of interest in food, food sensory sensitivity, or consequences of eating (e.g., choking)—and can result in weight loss and nutritional deficiency.
Risk factors consist of mental health conditions (e.g., autism, obsessive-compulsive disorder), family anxiety, parental eating disorders, and history of digestive conditions and other medical problems.

4. Binge-eating Disorder

Binge-eating disorder is characterized by regular episodes of eating a lot of food in a short time. These episodes are associated with feelings of loss of control at the time (e.g., eating rapidly, eating when no longer hungry), and feelings of depression, guilt, and self-disgust afterward.
Risk factors for binge eating include personal/family history and genetic predisposition.

6. Anorexia Nervosa

A clear sign of anorexia nervosa is very low body weight, which is one of three criteria used to diagnose this condition: 

1. Restriction of food intake resulting in abnormally low body weight.
2. Severe fears of gaining weight and attempts to prevent weight gain.
3. Body image disturbances, self-evaluations highly impacted by weight, or failure to realize the dangers of being severely underweight.

Individuals with the restrictive subtype of anorexia nervosa achieve their low weight mainly through exercise and dieting/fasting, while those with the binge-eating/purging subtype engage in purging as well.

Risk factors for anorexia nervosa comprise genetics, female sex (anorexia nervosa is much more common in women than in men), anxiety, obsessional traits, and either living in a culture (e.g., Western culture) or having a job or hobby (e.g., working as a model) that highly values thinness.

 Eating disorders can have serious mental health and physical health consequences.  For instance, anorexia nervosa is associated with a high risk of death. So, if you have been struggling with eating issues, do not delay seeking help.  Effective interventions are available and can give you the techniques you need to manage your eating habits.